just swapped a B18a1 in my 90 crx si, swapp went well, car fired up on 2nd crank, only issue is intermittently idle will start going up and down between 1000-1250 rpm, accelerates nicely no issues, performance good, im getting codes 5,7,14
witch i believe are MAP,IAC,and TPS, would ou guys say its a vacuum issue, or sensor problem, only intermittently does the idle bounce, thanks fella's.

 

Sounds like you mixed up your plugs. Double check them and the triple check them. Then test the voltages and make sure that all the prongs in teh sensors aren't bent (happened to me)